The polls have got every election forecast wrong in the last decade at least so I wouldn't pay any attention to them. But history tells us that governments rarely do more than 15year stints and when they do, it usually leads to a big majority for the opposition and that's why Truss is going for it with full cream Tory idealist policies that are rarely allowed out of their dreams - as she knows she's been left with just two years in office whatever she does.
So the more radical Tory policies in place when Labour take over, the harder it is for them to get them back to the level they want. It's Machiavellian, but then Brown did exactly the same in his two years as PM - putting the higher tax rate up to 50% as a leaving present for the new Cameron govt.